066 wont run right

Stihl4life · Jul 11, 2006

While using my 066 today, it seemed underpowered. It came with a 36" bar when i bought it, but it just wont cut like it should. It always stalls in the log. Also, while making relief cuts, it wouldnt run right. It would cut fine going one way, but sputter and stall the other. Any help would be great.

THALL10326 · Jul 12, 2006

Stihl4life said:
While using my 066 today, it seemed underpowered. It came with a 36" bar when i bought it, but it just wont cut like it should. It always stalls in the log. Also, while making relief cuts, it wouldnt run right. It would cut fine going one way, but sputter and stall the other. Any help would be great.

Is this a brand new 660?? or a older 066??

Marco · Jul 12, 2006

IF it runs right one way and not the other, I would look for any holes or tears in the intake boot and pulse line.

THALL10326 · Jul 12, 2006

Stihl4life said:
While using my 066 today, it seemed underpowered. It came with a 36" bar when i bought it, but it just wont cut like it should. It always stalls in the log. Also, while making relief cuts, it wouldnt run right. It would cut fine going one way, but sputter and stall the other. Any help would be great.

Do the basics first.
1.Chain, sharp or dull?, cutting straight or sideways?
2.Bar, straight or bent?
3.Using fresh fuel mix or old mix out of a stored can?
4.Fuel filter clean or dirty, should look completely white?
5.Air filter, clean or dirty?
6.Carb adjusted right?, if not will not run right.
7.Fuel hose, check for cracks or wet gas.
8.Check condition of the plug, wire as well.
8.Check Rpm levels if you can.

Do the above first, shouldn't take more than 20 minutes.
If everything is ok go farther. Somewhere the problem will
appear if you take it step by step. Does not sound like
internal damage but do the above first before digging deeper
into the saw. Could be something as simple as a tank vent.
Do the steps and you'll find the problem.......

Stihl4life · Jul 12, 2006

Thall, to answer your first question, the saw is the newer 066. Its an MS660 with an 066 badg is waht Lakeside told me.

THALL10326 · Jul 12, 2006

Stihl4life said:
Thall, to answer your first question, the saw is the newer 066. Its an MS660 with an 066 badg is waht Lakeside told me.

Ok, thats cool. Go step by step, no need to fear, you will find the cause if you work your way to it. Samething we at the shop do so getcha self in the mood to inspect your saw, you can and will find the cause with alittle patience and a keen eye, go getter done. Holler back if it still stumps ya. I'm going to bed but I'll be back tomorrow to see what you have found and will help you any way I can to get that moma running for ya..............